Question about 2001 Cadillac DeVille

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Security light If I remove the ECM fuse, will I have to re program the keys?

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No. You will just have to get the Code for the Stereo to work. The Keys will be Fine.

Posted on Jan 30, 2009

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My husband was checking the fuse trying to see what fuse was the cigarette lighter and the security light came on and know my car is trying crank but wont


What Year ? The engine turns over but won't start ? Is this the problem SECURITY light lit or flashing ? If SECURITY light is on the PCM/ECM - engine computer disables the fuel injectors ,so it won't start . If the SECURITY light is on there is codes stored in the PCM/ECM or the theft deterrent module . Your husband messed with something he shouldn't have .

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Hai there. my chevrolet lumina 2006 i replaced ECM ,BCM, PIM and trasmittor with key . module programing done and ecm to bcm security link also done . still car is not starting, i found dtc p0633...


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Power windows stuck, engine light blinking & ignition won't turn


I see several problems here. While one major problem may lead to the others by causing faults in the ECM I would be very careful how I proceeded. The best advice I can give you is take it to a dealer. They have machines that can bypass and test the ECM. Unfortunately, the ECM is rather costly and just doing replacement testing is going to be too costly. The key issue is rather interesting. If your key has a chip inside it for security I would assume the ECM is faulty. What you described about driving is the vehicle running in failsafe mode to get to a repair shop. This is a feature chrysler toyed with for a few years in some models. If the ECM faults out there is a default set of programming that kicks in so you can get it to a shop.

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How do I program my key for my 2006 Chevy Impala?


Add Duplicate Key (PK3 or PK3+ key)
1. Insert an existing key into the ignition cylinder.
2. Turn the ignition cylinder to ON (RUN) and back to OFF.
3. Remove the existing key and, within fifteen seconds, insert the new key
and turn it to ON (RUN).
4. The security light will light up for two seconds to indicate success in programming
the key into the vehicle.
Originate New Master Key (PK3 or PK3+ key)

1. Insert new key into ignition cylinder and turn it to the ON (RUN) position.
The security light on the dash will illuminate and stay on for ten minutes.
2. When the security light goes out, you have one minute to start the next
step. Turn the ignition cylinder to OFF and then back to the ON (RUN)
position. The security light on the dash will illuminate and stay on for ten
more minutes.
3. When the security light goes out, you have one minute to start the next
step. Turn the ignition cylinder to OFF and then back on the ON (RUN)
position. The security light on the dash will illuminate and stay on for ten
more minutes.
4. After the security light has gone off the third time, the key has been programmed
into the vehicle’s computer and will operate the car. It has replaced ALL the
previous electronic key codes and is the ONLY key programmed into the
vehicle’s computer.

Add Duplicate Key (PK3 or PK3+ key)

1. Insert an existing key into the ignition cylinder.
2. Turn the ignition cylinder to ON (RUN) and back to OFF.
3. Remove the existing key and, within fifteen seconds, insert the new key
and turn it to ON (RUN).
4. The security light will light up for two seconds to indicate success in programming
the key into the vehicle.

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1 Answer

94 vette won't start,bat good,have org. key,fuses ok,high beam light on lights off,lcd cluster won't light up?


Disconect the battery and ECM for FOUR DAYS then reconect the ECM and BATTERY. Let it sit for another four days without turning anything on. It should start but will run rough for about 200 miles as the ECM relearns the system. I had the same issue and that is what fixed it.

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1 Answer

2001 cadillac deville security light won't turn off


It should have Turned off with the Insert of the Newly Programmed Key. If Not, It may need a Computer Reset. You Can try Pulling the ECM Fuse for 5 Min. to Reset the Computer. If this does not work, Try disconnecting the Battery and Reconnecting. Make sure that you have a RadioCode before Disconnecting the Battery Though. Please Rate My Response! Thanks!

Jan 30, 2009 | 2000 Cadillac DeVille

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